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Finding the Fourth Proportional to 315,473.54, 435,354.96 and 172,236.86

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Solution

The fourth proportional to 315,473.54, 435,354.96 and 172,236.86 is: 237,687.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,473.54 : 435,354.96 = 172,236.86 : x
  2. Step 2: Convert to fraction form
    315,473.54/435,354.96 = 172,236.86/x
  3. Step 3: Cross multiply
    315,473.54x = 435,354.96 × 172,236.86
  4. Step 4: Simplify right side
    315,473.54x = 74,984,171,295.83
  5. Step 5: Solve for x
    x = 74,984,171,295.83/315,473.54
  6. Step 6: Final answer
    x = 237,687.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.